It's written that "Most WordPress.com users won’t find a Plugins tab in your dashboard. We include and configure the plugins for you, so you don’t need to worry about them."
We need plugins like SEO (http://wordpress.org/extend/plugins/all-in-one-seo-pack/).
I'm a free user so I don't know how to enable plugins. Please contact me as soon as possible, thanks!
The blog I need help with is asdfscience.wordpress.com.